The Blizzcon 2019 schedule has been revealed. While existing games like Overwatch, Heroes of the Storm, and Hearthstone have featured slots, the schedule includes multiple panels labeled with "coming soon." Rumors say we may get our first glimpses of Overwatch 2 or Diablo 4.
Blizzcon 2019 Schedule Revealed, Includes Overwatch, StarCraft, & More - GS News Update
We may get our first look at Diablo 4.